CVE-2026-8730

🔶 medium

Summary

A flaw has been found in Open5GS up to 2.7.6. This impacts the function ogs_sbi_nf_instance_set_id in the library /lib/sbi/context.c of the component NRF. Executing a manipulation of the argument nfInstanceId can lead to denial of service. The attack may be performed from remote. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS Score

4.3

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2026-05-17

First Seen: 2026-05-18

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 5.4% of all 321,566 vulnerabilities in our database.

#304,103

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: May 18, 2026

🔍 Exploitation Status

Poc

Proof-of-concept available

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

LinJu (VulDB User) (reporter) VulDB CNA Team (coordinator)

SSVC data provided by CISA

Last Modified 2026-05-19

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE IDs (Weakness Types)

CWE-404

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
open5gs	open5gs	Affected	< 2.7.6

🔗 References 5

https://github.com/open5gs/open5gs/

Product

https://github.com/open5gs/open5gs/issues/4462

Exploit Issue Tracking

https://vuldb.com/submit/808514

Third Party Advisory VDB Entry

https://vuldb.com/vuln/364319

Third Party Advisory VDB Entry

https://vuldb.com/vuln/364319/cti

Permissions Required VDB Entry

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-8728	🔶 medium	4.3	0.1	A security vulnerability has been detected in Open5GS up to 2.7.7. The impacted element is the function ogs_sbi_discover...	2026-05-17
CVE-2026-8729	🔶 medium	4.3	0.1	A vulnerability was detected in Open5GS up to 2.7.7. This affects an unknown function in the library /lib/sbi/message.c ...	2026-05-17
CVE-2026-8731	🔶 medium	4.3	0.0	A vulnerability has been found in Open5GS up to 2.7.7. Affected is the function ogs_sbi_client_add in the library /lib/s...	2026-05-17
CVE-2026-8743	🔶 medium	6.3	0.0	A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file sr...	2026-05-17
CVE-2026-8744	🔶 medium	4.3	0.1	A vulnerability was determined in Open5GS up to 2.7.7. Affected is the function ogs_sbi_subscription_data_add/ogs_sbi_nf...	2026-05-17
CVE-2026-8745	🔶 medium	4.3	0.0	A vulnerability was identified in Open5GS up to 2.7.7. Affected by this vulnerability is the function ogs_timer_add in t...	2026-05-17

These CVEs affect the same products